Machine for coating can ends



Feb. 25, 1930. I G F, HAR MAN 1,748,127

MACHINE FOR COATING CAN ENDS Filed Nov. 22. 1928 II I Ill l'nmu H 'II 1 I "I IHII llll' Hm I: III] llal' v INVENTOR.

k BY

ATTORNEYS i 1 20 tion 1 material.

Patented Feb. 25, 1930 UNITEDTSTATEESZ PATENT OFFICE GEORGE FRANOI'S'HARTMAN, o 'RosE-D LE; MARYLAND, ASSIGNOR T CONTINENTAL I CAN, COMPANY, me on new YO K, N. Y., A. CORPORATION OF NEW YORK MACHINE FOR COATING CAN ENDS Applicationfiled. November 22, 1928. Serial Noa 232L148.

' The invention relates to new and useful improvements in machinesfor coating can ends, and more particularly to a machine wherein the sealing material coated on the can end is discharged under pressure through a nozzle against the surfaceto be coated.

An object of the invention is to provide a machine of the above type with a device adjacent thenozzle having a chamber in which air maybe trapped and compressed by the sealing material supplied-'to'the nozzle 50 that when the valve is opened to permit the flow of the sealing material from the nozzle an auxiliary supply is provided under pressure which 7 1'5 causes the'sealing material to quickly fill the opening in the nozzle andto be discharged therefrom in a stream of fullcapacity. In the drawings which'show by way of illustration 'oneembodiment. of the invenv Fig. l isa View in vertical section through a portion of a machine embodying the improvements with the nozzle closed and the end positioned for coating. e i v Fig. 2 is a similarvi'ew but showing the nozzle opened and the sealingv material flowing therefrom.

'In'the application, Serial No. 251,092, filed by Frederick A. 'Prahland Henry A. Fink,-

February 1, 1928 there is shown and de- 7 scribed a machine for coating can ends where- "in a nozzle is arranged beneath the'can end to I be coated and thesealing material forced by pressure to flow from the nozzle onto the sur- '35' face to be coated. In this machine there is a waive located within the nozzle to control the 14. The seahng materlal is supplied through flow of the sealing material from the nozzle. When the valve is moved to position for opening the nozzle a space is formed betweenthe V I valve stem and the nozzle opening which must which'de-vice" is provided with a closed charn- "ber'inwhich air maybe trapped by the sealing Thisdevice is connected to the nozzle adjacent the delivery 'opening ofthe C, nozzle. When the nozzle is closed the sealing 5 material is forcedintothe chamber and'compresses air therein. When the nozzle is opened the expanding of the air will cause the sealing material to flow from the chamber and thus provide an additional supply which I will quickly fill the space between the end of the valve stem and the nozzle opening so that the sealing material will be quickly discharged to the full capacity of the opening in the nozzle.

In the drawings only a portion of'the machine referred to is shown. It consists of a support 1 on which is mounted a lower chuck 2. Said chuck is carried by a spindle 3 which is free to rotate in the support 1. Cooperating with the chuck 2 is an upper chuck 4. Int-he drawings the can end to be coated isindicated at 5. Said can end has a channel portion 6 with the outer edge thereof curled as indicated at 7. This forms a channel which faces downwardly.

Attached to the support 1 is a bracket member 8. This bracket member 8 is provided with a passageway 9 therein. At the upper end of the bracket member is a nozzle 10 which is detachably secured to the member 8. This nozzle has a discharge opening 11. Lo-

cated within the passageway 9 is a valve stem 12' of the needle type. The upper end of this valve stem is tapered to a point as indicated at'13. The inner surface of the nozzle is tapered to conform to the taper on the end of thevalve stem and when this valve stem is raised it will snugly fit the inner wall of the nozzle and extend into the opening 11 was to close the same.

Attached to the member 8 is asupply pipe this pipe 14 to the passageway 9 in the memher 8 as indicated in the broken lines in the drawing. The sealing material is supplied under pressure. When the valve stem is low- A ered and the discharge opening of the nozzle freed,. then the sealing material will flow through said dischargeopening and against the surface of the channel in the can end, thus supplying said channel with a coating of sealing material.

Attached to the member 8 adjacent the nozzle 10 is an elbow pipe-15. This pipe is threaded into the member 8. Threaded into coated.

the elbow member 15 is a device 16 which is formed with a chamber 17 which is closed to the atmosphere. ,l/Vhen the valve stem is closed the sealing material will be forced into this device 16 and rise therein to the line 'Theva'lve is closed andthe air is under'com- V pression, as shown 1n Fig.1. WVhen the valveis opened, as shown in Fig. 2, then there isja space formed between the end ofthe valve stem and the discharge opening in the nozzlewhich must be first filled with sealing mate:

rial before the sealing material can flow from the opening in the nozzle. This space is partly filled by the supply of sealing material, from the pipe'l4i and an additional supply of material will be quickly supplied to fill said space from the-chamber 17 due to the expanding of the airin the chamber. The pipe 15 connects with the passageway 9 very close to the nozzle so that there is a very quick response when the valve is opened and the space filled with the sealing material so that as soon as it begins to flow from the nozzle it will flow in a stream of full capacity. The line BTB in Fig. 2 indicates the level of the sealing material in the chamber 17 when the air has expanded to force a portionof the sealing material from the chamber into the passage leading to the nozzle. I

The can end is rotated in the structure referred to above and if a very thin stream of sealing material is first supplied which increases to niax1mum capacity, there will be an uneven coating of the can end. It is very when it begins to discharge the sealing-mater1al,shall furnlsh a stream of seal-mg material of maximum capacity- Furthermore when the stream of; sealing material'is of maximum capacity the number of revolutions given thecan end to complete the coating thereof may be greatly reduced for the-roe son that the coating will start at-full-capacity end, and, of course, it will immediately stop when the valve: is closed. This enables the can end to be rotated to a su-flicient extent afterthe 'flow'of the sealing material-ceases so as to lay any trailing end within the desired coating limits. This avoids the soiling of the can end when movedlaterally from the chuck by laying any trailing endonto the parts of thei end which should'not be lVhile the invention is shown and. described in connection with a nozzle supplying the coating from beneath the-can end, it will-hie understood, 10f .course, that the device is valve is opened. 7

3. A machine for coating can ends' inequally applicable to coating nozzles arranged above thecan ends or in any other relation to the can end. The essential feature resides in the capability of supplying a stream of sealing material of full capacity almost instantaneously when the valve is. opened. p 7

It is obvious-that minor changes in the detailsof construction and the arrangement of the parts may be made without departing from the spirit of the invention 'asxs et forth in the appended claims.

Having fullydescribed my invention what V g I claim as new and desire to secure by Let V ters Patent, is

ing' a coating nozzle towhich a sealingma- 'terial is applied under pressure, a valve for closing said nozzle, means for rotatably supporting a can end relative to the nozzle, and a device adjacent, the nozzle. having achamber closed to the atmosphere and connected to the nozzle in which air is trapped and compressed by the sealing material, the expansion I V of the air insaid chamber operating .to quick- 1. A machine for coatl-ngcan ends includly supply sealing material froms'ai-d chamber 7 to the nozzle when the valve is opened. 7

2. A machine for coating can ends including means for 'rotatably supporting the. can end with the channel thereof facing downwardly, a coatingnozzle located beneath said can end for discharging sealing material dethe surface to be coated, a valve for closing the nozzle, and a device adjacentthe nozzle having a chamber'therein closed to the atlivered to the nozzle under pressure against 7 a mosphere and connected to the nozzle in which air is trapped and compressed by-the sealing material,the expansion of the air 7 operating to quickly supply sealing material from the chamber' to the nozzle when. the

eludinga coating nozzle to which sealing material is applied under pressure, a v'alvestem the end thereof for. closing the discharge openingzof the nozzle meansfor rotatably V supporting a. can endrelati-veto the nozzle, i and fL ClGVICQ ad gacen't the nozzle having a when 1t first strikes the channel 1n the can V d I :11; chamber closedto the atmosphere and connected to the nozzle is which air is trapped and compressed by the sealing material, the

expansion of the air operating, to quickly supply sealing material from the chamber to the, nozzle when the valve; is: opened.

4. A machine for coating can ends including a coating nozzle to whichsealingmaterial V o is applied under pressure, a valve stem :10

cated within the nozzlehavinga valveat't he end thereof for closing the discharge opening. of the: nozzle, means for rotatably' supportin a can end relative to the nozzle, an L.- shape nozzle and having a passage leading to-the I 31:10 located witlnn the nozzle havlng a Valve at pessage through which the sealing material flows t the nozzle, and a device connected to said pipe having a chamber therein closed to the atmosphere and in which air is trapped and compressed by the sealing material.

- In testimony Wheredf, I affix my signature.

GEORGE FRANCIS HARTMAN. 

